Vacancy Engineering for High-Efficiency Nanofluidic Osmotic Energy Generation.

Safaei, J; Gao, Y; Hosseinpour, M; Zhang, X; Sun, Y; Tang, X; Zhang, Z; Wang, S; Guo, X; Wang, Y; Chen, Z; Zhou, D; Kang, F; Jiang, L; Wang, G

Vacancy Engineering for High-Efficiency Nanofluidic Osmotic Energy Generation.

Safaei, J

Gao, Y Hosseinpour, M Zhang, X Sun, Y Tang, X Zhang, Z Wang, S

Guo, X

Wang, Y Chen, Z Zhou, D Kang, F Jiang, L Wang, G

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: J Am Chem Soc, 2023, 145, (4), pp. 2669-2678
Issue Date:: 2023-02-01

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Field	Value	Language
dc.contributor.author	Safaei, J https://orcid.org/0000-0003-3397-5026
dc.contributor.author	Gao, Y
dc.contributor.author	Hosseinpour, M
dc.contributor.author	Zhang, X
dc.contributor.author	Sun, Y
dc.contributor.author	Tang, X
dc.contributor.author	Zhang, Z
dc.contributor.author	Wang, S https://orcid.org/0009-0000-0519-4842
dc.contributor.author	Guo, X https://orcid.org/0000-0001-7771-0463
dc.contributor.author	Wang, Y
dc.contributor.author	Chen, Z
dc.contributor.author	Zhou, D
dc.contributor.author	Kang, F
dc.contributor.author	Jiang, L
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2024-03-26T00:01:52Z
dc.date.available	2024-03-26T00:01:52Z
dc.date.issued	2023-02-01
dc.identifier.citation	J Am Chem Soc, 2023, 145, (4), pp. 2669-2678
dc.identifier.issn	0002-7863
dc.identifier.issn	1520-5126
dc.identifier.uri	http://hdl.handle.net/10453/177147
dc.description.abstract	Two-dimensional (2D) nanofluidic membranes have shown great promise in harvesting osmotic energy from the salinity difference between seawater and fresh water. However, the output power densities are strongly hampered by insufficient membrane permselectivity. Herein, we demonstrate that vacancy engineering is an effective strategy to enhance the permselectivity of 2D nanofluidic membranes to achieve high-efficiency osmotic energy generation. Phosphorus vacancies were facilely created on NbOPO4 (NbP) nanosheets, which remarkably enlarged their negative surface charge. As verified by both experimental and theoretical investigations, the vacancy-introduced NbP (V-NbP) exhibited fast transmembrane ion migration and high ionic selectivity originating from the improved electrostatic affinity of cations. When applied in a natural river water\|seawater osmotic power generator, the macroscopic-scale V-NbP membrane delivered a record-high power density of 10.7 W m-2, far exceeding the commercial benchmark of 5.0 W m-2. This work endows the remarkable potential of vacancy engineering for 2D materials in nanofluidic energy devices.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	J Am Chem Soc
dc.relation.isbasedon	10.1021/jacs.2c12936
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences
dc.subject.classification	General Chemistry
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.title	Vacancy Engineering for High-Efficiency Nanofluidic Osmotic Energy Generation.
dc.type	Journal Article
utslib.citation.volume	145
utslib.location.activity	United States
utslib.for	03 Chemical Sciences
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2024-03-26T00:01:50Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	145
utslib.citation.issue	4

Abstract:

Two-dimensional (2D) nanofluidic membranes have shown great promise in harvesting osmotic energy from the salinity difference between seawater and fresh water. However, the output power densities are strongly hampered by insufficient membrane permselectivity. Herein, we demonstrate that vacancy engineering is an effective strategy to enhance the permselectivity of 2D nanofluidic membranes to achieve high-efficiency osmotic energy generation. Phosphorus vacancies were facilely created on NbOPO4 (NbP) nanosheets, which remarkably enlarged their negative surface charge. As verified by both experimental and theoretical investigations, the vacancy-introduced NbP (V-NbP) exhibited fast transmembrane ion migration and high ionic selectivity originating from the improved electrostatic affinity of cations. When applied in a natural river water|seawater osmotic power generator, the macroscopic-scale V-NbP membrane delivered a record-high power density of 10.7 W m-2, far exceeding the commercial benchmark of 5.0 W m-2. This work endows the remarkable potential of vacancy engineering for 2D materials in nanofluidic energy devices.

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http://hdl.handle.net/10453/177147